Google Hangouts permission to record microphone

I made a mistake today, I received my first call on my Nexus 6P via Google Hangouts and got hit with a few security questions. In my rush to try and answer the call I said no to don't allow the microphone to record the call which I misunderstood. Now I can't figure out how to allow Hangouts to have permission to use the microphone. I clicked the box to never ask the question again.

Settings > Apps > Hangouts > Permissions. Adjust as desired. This works for ALL apps, though if they were not designed for Marshmallow you will get a warning that some features of the app may not work and to proceed with caution.